Patents by Inventor Mathias Petrowitsch

Mathias Petrowitsch has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for producing a piston for an internal combustion engine and piston produced by means of said method
    Patent number: 10174710
    Abstract: A method for producing a piston may include aligning at least two piston components along corresponding joining surfaces, activating a laser designed for deep-welding, and aligning a laser beam with a starting point. The method may then include increasing a power density of the laser beam over a first defined path along the joining surfaces to produce a weld seam with an increasing weld seam depth, deep welding along the joining surfaces to produce a deep weld seam with a substantially constant weld seam depth up to a defined end point, and reducing the power density over a second defined path to produce a weld seam with a decreasing weld seam depth. The method may further include overwelding at least part of at least one of the first and second defined paths by a laser designed for heat conduction welding to produce at least one heat conduction weld seam.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: January 8, 2019
    Assignee: Mahle International GmbH
    Inventors: Karlheinz Bing, Daniel Mock, Mathias Petrowitsch
  • METHOD FOR PRODUCING A PISTON FOR AN INTERNAL COMBUSTION ENGINE AND PISTON PRODUCED BY MEANS OF SAID METHOD
    Publication number: 20170107934
    Abstract: A method for producing a piston may include aligning at least two piston components along corresponding joining surfaces, activating a laser designed for deep-welding, and aligning a laser beam with a starting point. The method may then include increasing a power density of the laser beam over a first defined path along the joining surfaces to produce a weld seam with an increasing weld seam depth, deep welding along the joining surfaces to produce a deep weld seam with a substantially constant weld seam depth up to a defined end point, and reducing the power density over a second defined path to produce a weld seam with a decreasing weld seam depth. The method may further include overwelding at least part of at least one of the first and second defined paths by a laser designed for heat conduction welding to produce at least one heat conduction weld seam.
    Type: Application
    Filed: May 13, 2015
    Publication date: April 20, 2017
    Inventors: Karlheinz Bing, Daniel Mock, Mathias Petrowitsch